Can someone help please?

Julia is going for a walk through the neighborhood. what unit of measure is most appropriate to describe the distance she walks?

Suppose you are an avid reader and are looking to save money on the cost of books instead of paying about $20 for each book, you decide to look into purchasing a kindle for $120 you can purchase e-books for about $5 each 1. find the slope-intercept equation for the cost of the hard copy of books using x to represent the number of books 2. find the slope-intercept equation for the cost of the kindle with cost of e-books using x to represent the number of books

What is the unit rate of, 75% high fiber chimp food to 25% high protein chimp food.